Updates to GitGutter

* Change to use tags for releases
* Point a new *Edge* version to master
* Pointer a new *Release-Candidate* version to the release-candidate branch

This will allow users to easily install and test out new features before pushed onto the masses

repository/g.json

@@ -230,13 +230,33 @@
 			"releases": [
 				{
 					"sublime_text": "*",
-					"details": "https://github.com/jisaacks/GitGutter/tree/master"
+					"details": "https://github.com/jisaacks/GitGutter/tags"
 				}
 			],
 			"previous_names": [
 				"Git Gutter"
 			]
 		},
+		{
+			"name": "GitGutter-Edge",
+			"details": "https://github.com/jisaacks/GitGutter",
+			"releases": [
+				{
+					"sublime_text": "*",
+					"details": "https://github.com/jisaacks/GitGutter/tree/master"
+				}
+			]
+		},
+		{
+			"name": "GitGutter-Release-Candidate",
+			"details": "https://github.com/jisaacks/GitGutter",
+			"releases": [
+				{
+					"sublime_text": "*",
+					"details": "https://github.com/jisaacks/GitGutter/tree/release-candidate"
+				}
+			]
+		},
 		{
 			"name": "Github Color Theme",
 			"details": "https://github.com/AlexanderEkdahl/github-sublime-theme",